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Varietal Differences of Juvenile Phase Duration and Photoperiodic Sensitivity in Paddy Rice
Cropping area Juvenile phase Paddy rice Photoperiodic sensitivity Varieties
2009/8/6
The juvenile phase and photoperiodic sensitivity of 13 Japanese paddy rice varieties were investigated. The duration of juvenile phase was determined by counting the days of insensitivity to a short-d...
Floral Impotency Due to Cool Weather in Paddy Rice Plants in the Early-Season Culture Area:II. Countermeasure to the damage by fertilizer application
C-N ratio Compost Cool-summer damage Early-season culture Light-intercepting characteristics
2009/8/6
The present study was conducted to develop the basal fertilizer application methods which mitigate the damage due to cool weather at booting stage by investigating the relationships between the change...
Floral Impotency Due to Cool Weather in Paddy Rice Plants in the Early-Season Culture Area:I. Relationship between light-intercepting characteristics and sterility
Amount of fertilizer nitrogen Cool-summer damage Early-season culture Light-intercepting characteristics Overluxuriant growth Sunshine hours Temperature at the inside of leaf sheath Temperature in the space of rows
2009/8/6
The present study was conducted to make clear the cause of promotion the sterility due to cool temperature at the booting stage by too much nitrogen application with investigating the relationship amo...
Effect of Field Drainage on Root Lodging Tolerance in Direct-Sown Rice in Flooded Paddy Field
Direct-sown rice cultivation Field drainage Irrigation management Pushing resistance Rice Root Root-lodging tolerance
2009/7/29
To elucidate the effect of drainage of paddy fields on root lodging tolerance in direct-sown rice, we measured the pushing resistance (R), diameter of hill at the base (Dm), shoot dry weight (Ws) and ...
Elementary Identification of Phenolic Allelochemicals from Dwarf Lilyturf Plant (Ophiopogon japonicus K.) and Their Growth-Inhibiting Effects for Two Weeds in Paddy Rice Field
Allelochemicals Barnyardgrass Dwarf lilyturf HPLC Monchoria
2009/7/29
Dwarf lilyturf (Ophiopogon japonicus K.), used as a weed-suppressing cover crop and a medicinal plant, was suggested to be a promising natural herbicide to control weeds in the rice field through its ...
Effects of High Temperature on Growth,Yield and Dry-Matter Production of Rice Grown in the Paddy Field
Grain yield High temperatures Photosynthetic rate Rice (Oryza sativa L.) Spikelet sterility
2009/7/23
The effect of high temperatures on growth, yield and dry-matter production of rice growing in the paddy field was examined during the whole growth period in a temperature gradient chamber (TGC) from 2...
Daytime and Nighttime Field Spectral Imagery of Ripening Paddy Rice for Determining Leaf Greenness and 1000-Grain Weight
Artificial light source Digital image Reflectance Rice SPAD 1000-grain weight
2009/7/21
A spectral-image observation technique to measure the reflectance information of rice plant organs (instead of the overall canopy) under either daylight or artificial light at night was developed, and...
Continuous Monitoring of Visible and Near-Infrared Band Reflectance from a Rice Paddy for Determining Nitrogen Uptake Using Digital Cameras
Digital camera Near-infrared Nitrogen absorption Red Reflectance Rice SPAD
2009/7/21
A two-band digital imaging system —one band for the visible red band (RED, 630−670 nm) and the other for the near infrared band (NIR, 820−900 nm)— was devised and positioned at a height of...
Effects of the Time of Deep-Water Treatment on Growth and Lodging Resistance in Japonica Type Paddy Rice
Breaking strength Cortical fiber Deep-water Lodging resistance Lysigenous aerenchyma Rice
2009/7/21
Recently sometimes deep water is used as a growth control technique in rice cultivation in Japan.To make clear the proper treatment for growth control, we studied five deep-water treatments(30cm depth...
Effect of Harvest Time on the Protein Composition(Glutelin, Prolamin, Albumin)and Amylose Content in Paddy Rice Cultivated by Aigamo Duck Farming System
Aigamo duck Amylose Harvest time Organic cultivation Protein
2009/7/15
Previously, we suggested that cultivation of paddy rice by Aigamo duck farming system, delayed the harvest time by about 10 days and improved the taste of rice due to the increased grain yield accomp...
Differences in the Morphophysiological Response to Atmospheric Humidity between Paddy and Upland Rice
Stomatal density Transpiration Paddy rice Atmospheric humidity
2009/7/9
The effects of atmospheric humidity on vegetative growth of paddy and upland rice were compared. A low atmospheric humidity (60%RH) significantly decreased the dry-matter production in paddy rice but...
Influence of Typhoon on the Paddy Rice Production in Kyushu and Yamaguchi Districts in 2004 and Salty Wind Damage of Rice Caused by Typhoon 0418 (SONGDA) : Haruhiko Yamamoto and Kiyoshi Iwaya (Faculty of Agriculture, Yamaguchi Univ., Yamaguchi 753-8515)
Kyushu district Rice Salty wind damage Typhoon 0418 Yamaguchi prefecture
2009/7/8
Five typhoons (No.15•16•18•21•23) approached and landed from booting to harvesting time in Kyushu and Yamaguchi districts in 2004. The grain yield and quality of paddy rice wer...
Relationship of Growth Variability, with Ground Level and Soil Water Content in a Large Paddy Field in Inashiki-city, Ibaraki-prefecture in 2007—Wet Injury of Wheat
Triticum spp Excess-moisture injury Wet endurance Upland field converted from paddy field
2009/7/7
There was a heavy rain fall on Nov. 19-20 and Dec. 26-27, 2006 in Ibaraki-prefecture. We examined wheat growth and soil conditions in a large paddy field in Inashiki-city, Ibaraki-prefecture, where p...